RT Conference Proceedings
T1 Tuning the activity of cobalt 2-hydroxyphosphonoacetates-derived electrocatalyst for water splitting and oxygen reduction: insights into the local order by pair distribution funcion analysis
A1 Vílchez-Cózar, Álvaro
A1 Pérez-Colodrero, Rosario Mercedes
A1 Bazaga-García, Montse
A1 Olivera-Pastor, Pascual
A1 Cabeza-Díaz, Aurelio
K1 Cristalografía - Congresos
AB Electrode materials generally exhibit complex heterostructures wherein both amorphous and crystalline phases may coexist [1]. Advanced techniques, such as Pair Distribution Function (PDF) analysis, may offer valuable structural insight into the local order and domain sizes of the active phase present in these materials.Herein, cobalt pyrophosphate- and phosphide-based electrocatalysts were prepared from the corresponding metal (R,S)-2-hydroxyphosphonoacetates by pyrolysis in N2 and 5%-H2/Ar at different temperatures (500 – 800 ºC) [2]. Their electrocatalytic performances toward the hydrogen and oxygen evolution reactions (HER, OER) and oxygen reduction reaction (ORR) werecompared with those resulting from the N-doping and P-enrichment of the electrocatalysts. In addition, differential PDF (d-PDF) analysis of the spent electrocatalysts revealed that, regardless the amorphous or crystalline nature of the metal pyrophosphate/phosphides obtained, all of them transformed into biphasic cobalt oxy(hydroxydes) under tested OER conditions. Conversely, d-PDF demonstrated that most effective electrocatalysts for HER and ORR maintained their stability during the experimental conditions.
YR 2024
FD 2024-01-16
LK https://hdl.handle.net/10630/29590
UL https://hdl.handle.net/10630/29590
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech; PID2019-110249RB-I00/AEI/10.13039/501100011033; TED2021–129836B-I00/AEI/10.13039/501100011033/Unión Europea NextGenerationEU/PRTR (MICIU, Spain);P20-00416 (Junta de Andalucia, Spain/FEDER)
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026